https://www.cpf.gov.sg/member/faq/growing-your-savings/retirement-sum-topping-up-scheme/i-am-55--can-i-transfer-my-ordinary-account-savings-to-my-specia


If I am 55, can I transfer my Ordinary Account savings to my Special Account to earn a higher interest rate?
No, you will not be able to make CPF transfers to your Special Account (SA) after you turn 55. Instead, your transfers will be made to your Retirement Account (RA), which was created for your retirement needs.

https://www.cpf.gov.sg/member/faq/growing-your-savings/retirement-sum-topping-up-scheme/what-is-the-maximum-amt-of-top-ups-i-can-receive